Table 1 Relevant adsorption parameters kinetic models.

From: A promising and cost-effective biochar adsorbent derived from jujube pit for the removal of Pb(II) from aqueous solution

Model

Parameter

Value

Pseudo-first-order

K1 (min−1)

0.026

qe (mg/g)

10.38

R2

0.800

Pseudo-second-order

K2 (g/(mg·min))

0.04

qe (mg/g)

83.3

R2

0.999

Elovich

α(mg/(g min))

143.1

β(mg/g)

0.077

R2

0.71

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